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capabilities.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# python standard library
import re
import os
import sys # , urllib.error, urllib.parse
import requests
import urllib3
# local pret classes
from helper import output, item
# third party modules
try:
from pysnmp.entity.rfc3413.oneliner import cmdgen
except ImportError:
pass
class capabilities():
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
# set defaults
support = False
# be quick and dirty
timeout = 1.5
# set pret.py directory
rundir = os.path.dirname(os.path.realpath(__file__)) + os.path.sep
'''
┌──────────────────────────────────────────────────────────┐
│ how to get printer's capabilities? │
├──────┬───────────────────────┬───────────────────────────┤
│ │ model (for db lookup) │ lang (ps/pjl/pcl support) │
├──────┼───────────────────────┼───────────────────────────┤
│ IPP │ printer-description │ printer-description │
│ SNMP │ hrDeviceDescr │ prtInterpreterDescription │
│ HTTP │ html-title │ - │
| HTTPS| html-title | - |
└──────┴───────────────────────┴───────────────────────────┘
'''
def __init__(self, args):
# skip this in unsafe mode
if not args.safe:
return
# set printer language
if args.mode == 'ps':
lang = ["PS", "PostScript", "BR-Script", "KPDL"]
if args.mode == 'pjl':
lang = ["PJL"]
if args.mode == 'pcl':
lang = ["PCL"]
# get list of PostScript/PJL/PCL capable printers
self.models = self.get_models(args.mode + ".dat")
# try to get printer capabilities via IPP/SNMP/HTTP
if not self.support:
self.ipp(args.target, lang)
if not self.support:
self.http(args.target)
if not self.support:
self.https(args.target)
if not self.support:
self.snmp(args.target, lang)
# feedback on PostScript/PJL/PCL support
self.feedback(self.support, lang[0])
# in safe mode, exit if unsupported
if args.safe and not self.support:
print((os.linesep + "Quitting as we are in safe mode."))
sys.exit()
print("")
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# get capabilities via IPP
def ipp(self, host, lang):
try:
# poor man's way to get printer info via IPP
sys.stdout.write("Checking for IPP support: ")
body = ("\x01\x01\x00\x0b\x00\x01\xab\x10\x01G\x00\x12attributes-charset\x00\x05utf-8H"
+ "\x00\x1battributes-natural-language\x00\x02enE\x00\x0bprinter-uri\x00\x14ipp:"
+ "//localhost/ipp/D\x00\x14requested-attributes\x00\x13printer-description\x03").encode()
request = requests.get("http://" + host + ":631/",
data=body, headers={'Content-type': 'application/ipp'})
response = request.content.decode()
# get name of device
# e.g. MDL:hp LaserJet 4250
model = item(re.findall("MDL:(.+?);", response))
# get language support
# e.g. CMD:PCL,PJL,POSTSCRIPT
langs = item(re.findall("CMD:(.+?);", response))
self.support = [_f for _f in [re.findall(
re.escape(pdl), langs, re.I) for pdl in lang] if _f]
self.set_support(model)
output().green("found")
except Exception as e:
output().errmsg("not found", e)
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# get capabilities via HTTP
def http(self, host):
try:
# poor man's way get http title
sys.stdout.write("Checking for HTTP support: ")
html = requests.get("http://" + host).text
# cause we are to parsimonious to import BeautifulSoup ;)
title = re.findall("<title.*?>\n?(.+?)\n?</title>",
html, re.I | re.M | re.S)
# get name of device
model = item(title)
# get language support
self.set_support(model)
output().green("found")
except Exception as e:
output().errmsg("not found", e)
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# get capabilities via HTTPS
def https(self, host):
try:
# poor man's way get https title
sys.stdout.write("Checking for HTTPS support: ")
html = requests.get("https://" + host, verify=False).text
# cause we are to parsimonious to import BeautifulSoup ;)
title = re.findall("<title.*?>\n?(.+?)\n?</title>",
html, re.I | re.M | re.S)
# get name of device
model = item(title)
# get language support
self.set_support(model)
output().green("found")
except Exception as e:
output().errmsg("not found", e)
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# get capabilities via SNMP
def snmp(self, host, lang):
try:
sys.stdout.write("Checking for SNMP support: ")
# query device description and supported languages
# HOST-RESOURCES-MIB → hrDeviceDescr
desc, desc_oid = [], '1.3.6.1.2.1.25.3.2.1.3'
# Printer-MIB → prtInterpreterDescription
pdls, pdls_oid = [], '1.3.6.1.2.1.43.15.1.1.5.1'
error, error_status, idx, binds = cmdgen.CommandGenerator().nextCmd(
cmdgen.CommunityData('public', mpModel=0), cmdgen.UdpTransportTarget(
(host, 161), timeout=self.timeout, retries=0), desc_oid, pdls_oid)
# exit on error
if error:
raise Exception(error)
if error_status:
raise Exception(error_status.prettyPrint())
# parse response
for row in binds:
for key, val in row:
if desc_oid in str(key):
desc.append(str(val))
if pdls_oid in str(key):
pdls.append(str(val))
# get name of device
model = item(desc)
# get language support
langs = ','.join(pdls)
self.support = [_f for _f in [re.findall(
re.escape(pdl), langs, re.I) for pdl in lang] if _f]
# self.set_support(model)
output().green("found")
except NameError:
output().errmsg("not found", "pysnmp module not installed")
except Exception as e:
output().errmsg("not found", e)
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# feedback on language support
def feedback(self, support, lang):
sys.stdout.write("Checking for %-21s" % (lang + " support: "))
if support:
output().green("found")
else:
output().warning("not found")
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# set language support
def set_support(self, model):
# model_stripped = re.sub(r'(\d|\s|-)[a-zA-Z]+$', '', model)
'''
┌───────────────────────────────────────────────────────┐
│ Experimental -- This might introduce false positives! │
├───────────────────────────────────────────────────────┤
│ The stripped down version of the model string removes │
│ endings like '-series', ' printer' (maybe localized), │
│ 'd' (duplex), 't' (tray), 'c' (color), 'n' (network). │
└───────────────────────────────────────────────────────┘
'''
self.support = [_f for _f in [re.findall(
re.escape(m), model, re.I) for m in self.models] if _f]
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# open database of supported devices
def get_models(self, file):
try:
with open(self.rundir + "db" + os.path.sep + file, 'r') as f:
models = [_f for _f in (line.strip() for line in f) if _f]
f.close()
return models
except IOError as e:
output().errmsg("Cannot open file", e)
return []